(AP) — Safety workshops were held this week in Kansas for people who work around combustible grain dust.

The workshops in Effingham were sponsored by the Kansas City chapter of the Grain Elevator and Processing Society. More than 60 grain industry employees from the region attended the sessions.

The  classes were conducted around the second anniversary of an explosion at a Bartlett Grain facility that killed six people. A moment of silence was held in honor of the victims.

Kingsly Ambrose, assistant professor in milling/grain processing at Kansas State university, said the workshops are intended to increase awareness of grain dust and its explosiveness. He says it takes the dispersal of billions of fine dust particles to create the devastating explosions.